(04-30-2024, 12:25 PM)dabigv13 Wrote: Russia appears to have recaptured Robotyne, a settlement that Ukraine had themselves recaptured in their counter offensive last year. Russia is pushing on several fronts.
https://x.com/Schizointel/status/1785340931308159097
GPS guided Excalibur rounds accuracy has been seriously degraded by Russian EW. Estimates of 6% accuracy now. Anecdotally videos of successful Excalibur strikes have been rare/absent the past several months.
https://x.com/konrad_muzyka/status/1785224435974250953
And supposedly Ukraine is no longer using GMLRS due to degraded accuracy. Some suggestion this could be a mistatement actually referring to GDSLB, as we know that has had problems and there have been plenty of recent GMLRS strike videos.
https://x.com/konrad_muzyka/status/1785218234028826902
More on GDSLB problems here. Boeing supposedly doing updates for guidance system that will hopefully help. Lockheed has been doing updates for JDAMs that may have helped somewhat.
https://www.defenseone.com/threats/2024/...ys/396141/
ATACMS still seems effective though. More strikes on Dzankhoi and other airbases in Crimea overnight.
Interesting that there seems to be differences in how effective Russian EW is against various GPS guided munitions. There may be different EW deployment at different ranges from the front or at airbase targets where Russia may be using less EW to avoid interrupting their own equipment. Also plausible that the different guidance systems themselves may be more or less susceptible or some have better or more robust secondary inertial guidance. Interesting that GMLRS and JDAM have underwent upgrades that at least partially counteract Russian EW while Excaliber and GDSLB have not or not yet had success with that.
An additional post with a similar theme
https://www.yahoo.com/news/russian-force...52064.html
The post clearly confirms that EW is the method by which Excalibur 155mm shells are being rendered inaccurate.
The GLSDB seems to be a complete dud :-). The targeting system has severe problems with GPS jamming and the ground launching scheme apparently is also problematic. Not a big surprise, as many weapons systems have initial "problems", although it appears the testing that was done did not replicate Ukrainian ground conditions.
Your analysis that different weapons have different vulnerabilities to jamming is exactly correct. I am frankly aghast at the fact we are apparently "studying the problem". These vulnerabilities are in no way new news, so the fact we have no "answer" ready to go is very disconcerting. The "best" way to "solve" it in the short term is to destroy the GPS jammers. This is always going to be the case because improvements in the weapons themselves must be developed, tested, and retrofitted to a very large number (many thousands) of weapons. That is at a minimum very costly and sometimes impractical. In particular, adding anything beyond software changes to Excalibur rounds is so mechanically challenging it is unlikely to be practical.
Modifications of existing weapons also has the problem that the jammers can possibly be modified in turn to defeat the changes. Historically Russia has been quite good a "jamming" and often utilize several different approaches to the problem simultaneously. This makes ECCM aginst them more difficult. The jammers will always have the advantage that modifying one jammer can negate the effectiveness of all instances of a given weapons system. OTOH modifications to a weapons system have to be applied to every instance of that weapon you intend to use.
ATACMS is vulnerable to GPS jamming. Many of the targets in Ukraine, particularly in Crimea, are not (yet) protected by GPS jamming because said targets were considered beyond the range of Ukrainian precision weapons. This was IMO certainly one reason not to announce our intention to provide them until after the fact. Russia doesn't have an infinite number of jammers, so the ATACMS will require them to deploy more of them than the "want to" and perhaps more than they have. In any case, they can't do it instantly. Make hay while the sun shines, because the clouds are on the way.